/Engine/Plugins/Runtime/GameplayAbilities/Source/GameplayAbilities/Public/AbilitySystemTestAttributeSet.h
Called just before a GameplayEffect is executed to modify the base value of an attribute. No more changes can be made. Note this is only called during an 'execute'. E.g., a modification to the 'base value' of an attribute. It is not called during an application of a GameplayEffect, such as a 5 ssecond +10 movement speed buff.
virtual void PostGameplayEffectExecute ( const struct [FGameplayEffectModCallbackData](API\Plugins\GameplayAbilities\FGameplayEffectModCallbackData) & Data )